If you've ever accidentally locked yourself out of a room in your home—as in, one of those push-button or twist-privacy locks that most bedroom and bathroom doors have—you know it can be a pain to open them again. If you have a paper clip however, getting back in is no problem.

The Sparrows UNCUFF LINK cufflinks look like normal accessories when they're in your sleeves, but pop them out and you can use them to unlock and open any pair of standard handcuffs, thanks to the key engineered into the body. We're not going to ask how you got into those cuffs in the first place, but no good…